INDEX 



455 



HOPPE-SEYLER on chlorophyll, 158, 

 190 



Humus, 67 



Hybridisation, 445 



Hydrocyanic acid, 181 



Hydrogen peroxide in photosynthe- 

 sis, 168 



Hydrophilous flowers, 438 



Hydrotropism, 392 



Hypnum, 198 



Hyponasty, 315 



Individual, 411 



Insectivorous plants, 149 ; Utricu- 

 laria, 201 ; Sarracenia, 202 ; 

 Nepenthes, 203 ; Cephalotus, 203 ; 

 Bartsia, 204; Lathrcea, 204; 

 Drosophyllum, 205 ; Pinguicula, 

 206 ; Dioncea, 206, 208 ; Drosera, 

 207 



Intercellular passages, 31, 32 ; for- 

 mation of, 32, 104 ; function of, 

 34, 104 ; watery vapour in, 74 ; 

 in Isoetes, 106, 332 ; in Marsilea, 

 107, 335 ; relation to stomata, 

 111; ratio to cellular tissue in 

 leaves, 113 ; composition of air 

 in, 113, 114; positive gaseous 

 pressure in, 117 ; in aquatic 

 plants, 330 



Intercellular substance, 45 



Inulase, 262, 264 



Inulin, 246 



Invertase, 262, 264, 443 



Iodine, 143, 188, 194 



Iron, in ash of plants, 143, 188; 

 combinations absorbed, 150, 192 ; 

 relation to chlorophyll, 163 ; 

 function of, 191 



Irritability, 359, 377, 394 



Isoetes, 106, 107, 332, 430 



JUMELLE on decomposition of car- 

 bon dioxide, 164 

 Juncus, 28, 29 



Kachree gourd, 266 



Karyokinesis, 413 



Katabolism, 137, 272, 298 



Kephir, 211 



Klinostat, 381 



KNIGHT on action of centrifugal 



force on the direction of growth, 



382 

 Laccase, 194, 300 



Lactase, 264 



Latent period of response to stimu- 

 lation, 407 



Lathrcea, 204, 217 



Laticiferous systems, 234 



Leaves, sclerenchyma of, 27 ; rolled, 

 112 ; irritability of, 372 



Lecithin, 190 



LeguminoscB, cotyledons of, 40 ; 

 absorption of nitrogen by, 148, 

 178, 211 ; irritability of leaves of, 

 372 



Lenticels, 34, 76 



Leucin, 180 



Leucoplasts, 162, 243 



Lichens, 210 



Light, influence of, on transpiration, 

 95 ; absorption of, by chlorophyll, 

 156, 292 ; necessary for formation 

 of chlorophyll, 162 ; action in 

 photosynthesis, 163, 170 ; tonic 

 influence of, 360 ; effect of, on 

 differentiation of leaves, 362 ; 

 effect on growth, 365 ; lateral, 

 378 



Lignin, 47, 50, 285 



Lilium Martagon, fertilisation of, 

 444 



Lipase, 262, 268 



Lithium, 188 



Locomotion, 290, 347, 348 



Lycopodium, 40, 198 



Lythrum, 442 



MACALLUM on composition of 

 nucleus, 191 



Magnesium, in ash, 143, 188 ; mode 

 of absorption of, 191 



Malic acid, attraction for anthero- 

 zoids, 393 



Maltase, 262 



Malto-dextrin, 263 



Manganese, 143, 194 



Marchantia, photo-epinasty of, 364, 

 380 



Marsilea, 51, 107 



Massula of Azolla, 440 



Medullary rays, influence of, on 

 transpiration current, 81 ; as store- 

 houses of reserve material, 239 



Megaspores, 429 



Melibiase, 264 



Melizitase, 264 



Mesocarpece, 422 



Mesocarpus, 358, 364, 403 



Metabolism, 6, 137, 272 



Metapectic acid, 42 



Metapectine, 42 



